Compile Nu/B&C daemon on jailbreak iOS device

I’ve installed THEOS on my iPad/iPhone and can compile c++ source code natively with g++ or clang.

The only barrier is the makefile, although I’ve learned basic makefile knowledge, there are some questions when I read makefile.OS X , e.g

USE_UPNP:=1

What does this mean? Do We need it on iOS device?